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प्रश्न
True or false?
In a chemical change, rearrangement of molecules and atoms involves some energy changes.
पर्याय
True
False
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उत्तर
True
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संबंधित प्रश्न
What do you observe when :
a piece of paper is burnt
State whether the following is physical or chemical changes.
passing electric current through a heater rod —
State whether the following is physical or chemical changes.
Melting of wax —
True or false?
During a physical change energy is either given out or absorbed by the system.
Fill in the blank
An earthquake is a _______ change.
Under which different types can the following changes be classified?
Stretching of a spring.
Give reason.
A dry handkerchief gets wet at once on dipping in water, but it takes longer for a wet handkerchief to dry.
Fill in the blanks with the appropriate words of the statement given below:
Chemical changes may involve exchange of energy in the form of __________ and _________.
How can a change occur in a substance?
Cut vegetables turn brown when exposed to air, this is due to ______.
